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-'\"
-'\" Copyright (c) 1993 The Regents of the University of California.
-'\" Copyright (c) 1994-1997 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\"
-.TH while n "" Tcl "Tcl Built-In Commands"
-.so man.macros
-.BS
-'\" Note:  do not modify the .SH NAME line immediately below!
-.SH NAME
-while \- Execute script repeatedly as long as a condition is met
-.SH SYNOPSIS
-\fBwhile \fItest body\fR
-.BE
-.SH DESCRIPTION
-.PP
-The \fBwhile\fR command evaluates \fItest\fR as an expression
-(in the same way that \fBexpr\fR evaluates its argument).
-The value of the expression must a proper boolean
-value; if it is a true value
-then \fIbody\fR is executed by passing it to the Tcl interpreter.
-Once \fIbody\fR has been executed then \fItest\fR is evaluated
-again, and the process repeats until eventually \fItest\fR
-evaluates to a false boolean value.  \fBContinue\fR
-commands may be executed inside \fIbody\fR to terminate the current
-iteration of the loop, and \fBbreak\fR
-commands may be executed inside \fIbody\fR to cause immediate
-termination of the \fBwhile\fR command.  The \fBwhile\fR command
-always returns an empty string.
-.PP
-Note: \fItest\fR should almost always be enclosed in braces.  If not,
-variable substitutions will be made before the \fBwhile\fR
-command starts executing, which means that variable changes
-made by the loop body will not be considered in the expression.
-This is likely to result in an infinite loop.  If \fItest\fR is
-enclosed in braces, variable substitutions are delayed until the
-expression is evaluated (before
-each loop iteration), so changes in the variables will be visible.
-For an example, try the following script with and without the braces
-around \fB$x<10\fR:
-.PP
-.CS
-set x 0
-\fBwhile\fR {$x<10} {
-    puts "x is $x"
-    incr x
-}
-.CE
-.SH EXAMPLE
-.PP
-Read lines from a channel until we get to the end of the stream, and
-print them out with a line-number prepended:
-.PP
-.CS
-set lineCount 0
-\fBwhile\fR {[gets $chan line] >= 0} {
-    puts "[incr lineCount]: $line"
-}
-.CE
-.SH "SEE ALSO"
-break(n), continue(n), for(n), foreach(n)
-.SH KEYWORDS
-boolean, loop, test, while